Results 81 to 90 of about 4,931 (238)

Use and abuse of detrital zircon U-Pb geochronology—A case from the Río Orinoco delta, eastern Venezuela

Geology, 2018
Advancements in mass spectrometry methods over the past two decades have allowed for rapid measurement of (U-Th)/Pb isotopes for geochronologic applications, a tool that has deeply influenced the way sediment provenance and paleo-tectonic reconstructions
M. Ibañez-Mejia, A. Pullen, M. Pepper, F. Urbani, Gourab Ghoshal, Juan C. Ibáñez-Mejía   +5 more
semanticscholar   +1 more source

Zircon U-Pb geochronology and trace element dataset from the Southern Rocky Mountain Volcanic Field, Colorado, USA. [PDF]

Data Brief, 2022
Sliwinski JT, Guillong M, Lipman PW, Zimmerer MJ, Deering C, Bachmann O.   +5 more
europepmc   +1 more source

High-precision zircon U-Pb geochronology of astronomically dated volcanic ash beds from the Mediterranean Miocene

, 2014
Several orbitally tuned Miocene sedimentary sequences around the Mediterranean contain abundant intercalated volcanic ash beds. These sequences provide the rare opportunity to directly compare radioisotopic dating methods with independent and accurate ...
Wotzlaw, Jörn Frederik, NWO-VENI: Middle Miocene global cooling: climate change through gateway closure, Hilgen, Frederik J., Hüsing, Silja K., Wotzlaw, Joern Frederik, Schaltegger, Urs, Stratigraphy and paleontology, Paleomagnetism   +7 more
core   +1 more source

Interpretation problems of LA-ICP-MS U-Pb geochronology

Review of the Bulgarian Geological Society, 2020
The existing practice for characterizing the time of a metamorphic event by the average mean of radiogenic mineral dates gives a false idea about the event duration. In the present communication this practice is discussed from the viewpoint of regional geology and geodynamics.
openaire   +1 more source

µID-TIMS: Spatially-resolved high-precision U-Pb zircon geochronology

Geochronology
Abstract. We present a novel methodology for spatially-resolved high-precision U-Pb geochronology of individual growth domains in complex zircon. Our approach utilizes a combined plasma (Xe+/Ar+) focused ion beam (PFIB)–femtosecond (fs) laser system equipped with a scanning electron microscope (SEM).
Sava Markovic, Jörn-Frederik Wotzlaw, Dawid Szymanowski, Joakim Reuteler, Peng Zeng, Cyril Chelle-Michou   +5 more
openaire   +5 more sources

Tantalum–(niobium–tin) mineralisation in African pegmatites and rare metal granites: Constraints from Ta–Nb oxide mineralogy, geochemistry and U–Pb geochronology

, 2015
Tantalum, an important metal for high-technology applications, is recovered from oxide minerals that are present as minor constituents in rare-metal granites and granitic rare-element pegmatites. Columbite-group minerals (CGM) account for the majority of
F. Melcher, T. Graupner, H. Gäbler, M. Sitnikova, F. Henjes‐Kunst, T. Oberthür, A. Gerdes, S. Dewaele   +7 more
semanticscholar   +1 more source

Evidence for prolonged Paleozoic metamorphism in the Eastern Blue Ridge from U-Pb Geochronology

, 2018
Direct evidence for the timing of Paleozoic metamorphism is limited in reliability and extent in the southern Appalachians compared to the northern Appalachians.
Greenawald, David
core   +2 more sources

Ductile Extrusion Triggered by Continental Collision in NE Brazil

Terra Nova, Volume 38, Issue 4, Page 266-277, August 2026.
ABSTRACT The Borborema Province in northeastern Brazil hosts one of the world's largest strike‐slip shear zone networks, active during the late Neoproterozoic assembly of West Gondwana. Whether these shear zones initiated during active continental collision or as a post‐orogenic response to far‐field stresses remains debated.
L. R. Tesser, C. E. Ganade, C. R. Cioffi, J. B. Forshaw, M. Hueck, E. Celis, M. A. S. Basei   +6 more
wiley   +1 more source

Synchronous Advance of the Alpine Glaciation Across the Northern and Southern Tibetan Plateau During the Mid‐Pleistocene Transition

Geophysical Research Letters, Volume 53, Issue 14, 28 July 2026.
Abstract Chronological studies of glacial sediments from the Shishapangma and Yarlung Tsangpo River valley indicate that Quaternary glaciation on the southern Tibetan Plateau commenced at ∼0.75–0.83 Ma. However, the oldest glacial deposits in the northern plateau are dated to only ∼0.46 Ma, markedly later than the Middle Pleistocene glacial ...
Chengying Liu, Benhong Guo, Wenjiao Xiao, Zaijun Li, Linkai Wang, Fei Wang   +5 more
wiley   +1 more source

Advances in Human Mass Balance Studies: An IQ Consortium Perspective on Current Practices and Emerging Trends

Clinical Pharmacology &Therapeutics, Volume 120, Issue 1, Page 43-54, July 2026.
Human radiolabeled mass balance studies are crucial for comprehensively characterizing the absorption, distribution, metabolism, and excretion (ADME) of investigational drugs, providing essential data for drug development, regulatory evaluation, and product labeling.
Jason Boer, Ellen Cannady, Filip Cuyckens, Ulrike Glaenzel, Camille Granvil, Felix Huth, Alexander D. James, Wenying Li, Céline Veau, Graeme Young, Qin Yue, Gregory S. Walker, Upendra A. Argikar, Jonathan N. Bauman, Cathy Cantalloube, Yu‐Luan Chen, Ping Kang, Patricia Moliner, Mette L. Pedersen, Isabel Piel, Simone Schadt, Hanno Schieferstein, Julia Suchomel, Shuai Wang, S. Cyrus Khojasteh   +24 more
wiley   +1 more source